Alyson Hannigan

Alyson HanniganAlexis Denisof
Alyson Hannigan arrives at the premiere of ' "American Reunion" at Grauman's Chinese Theatre on Monday. Hannigan, who appeared in all of the "American Pie" films and in television shows "How I Met Your Mother" and "Buffy the Vampire Slayer," is expecting her second child with actor Alexis... Frazer Harrison / Getty Images
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